package com.itheima.controller.backend.security;

import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import com.itheima.service.PermissionService;
import com.itheima.service.RoleService;
import com.itheima.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;


@Service
public class SpringSecurityUserService implements UserDetailsService {
    //查找服务，实现查询数据库
    @Autowired
    private UserService userService;

    @Autowired
    private RoleService roleService;

    @Autowired
    private PermissionService permissionService;


    //根据用户名查询数据库中用户信息
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.findByUsername(username);
        if (user == null){
            return null;
        }

        List<GrantedAuthority> list = new ArrayList<>();

        //查询用户角色和权限
        Set<Role> roles = user.getRoles();
        //遍历角色集合
        for (Role role : roles) {
            //授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                //授予权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        //封装user
        org.springframework.security.core.userdetails.User securityUser = new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
        return securityUser;
    }



}

